R-64ST - 17
I BLOWN FUSE F1
CARRY OUT 3D CHECKS.
1. If the fuse F1 is blown when the door is opened, check the 1st latch switch and monitor switch.
2. If the fuse F1 is blown by incorrect door switching replace the defective switch(es) and the fuse
F1.
3. If the fuse F1 is blown, this may occur due to short or ground in H.V. rectifier, magnetron, high
voltage transformer or H.V. wire or a ground in wire harness. Check them and replace the
defective parts or repair the wire harness.
4. If the fuse F1 is blown, there could be a shorts or grounds in electrical parts or wire harness.
Check them and replace the defective parts or repair the wire harness.
CARRY OUT 4R CHECKS.
CAUTION: Only replace fuse
F1 with the correct value replacement.
Table: Resistance of heating element
Parts name Resistance
Grill heating element Approximately 25.6 Ω x 2 = 51.2 Ω
J GRILL HEATING ELEMENT TEST
CARRY OUT
3D CHECKS
Before carrying out the following tests make sure the heating element is cool completely.
1. Resistance of heating element.
Disconnect the wire leads to the heating element to be tested. Using ohmmeter with low resistance
range. Check the resistance across the terminals of the heating element as described in the
following table.
2. Insulation resistance.
Disconnect the wire leads to the heating element to be tested. Check the insulation resistance
between the element terminal and cavity using a 500V - 100MΩ insulation tester. The insulation
resistance should be more than 10 MΩ in the cold start.
If the results of above test 1 and/or 2 are out of above specifications, the heating element is probably
faulty and should be replaced.
CARRY OUT 4R CHECKS. CARRY OUT 3D CHECKS.
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
R64ST_S.MANUAL 12/8/01, 11:01 am17
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